Touch control structure and display apparatus

ABSTRACT

A touch control structure includes a plurality of touch signal lines in a peripheral area. A respective touch signal line includes a double-layer structure in a double-layer region and a single-layer structure in a single-layer region. The peripheral area includes a first sub-area on a first side, a second sub-area on a second side, a third sub-area on a third side, a fourth sub-area on a fourth side, of the touch control area. The first sub-area includes a side region, and one or more corner regions. The double-layer region and the single-layer region are in the first sub-area, the first sub-area has a first shortest width along a direction from the touch control area to the first sub-area, the first shortest width is greater than a shortest width of at least one of sub-areas of the peripheral area other than the first sub-area.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. application Ser. No.17/438,777, filed Dec. 4, 2020, which is a national stage applicationunder 35 U.S.C. § 371 of International Application No.PCT/CN2020/133924, filed Dec. 4, 2020. Each of the forgoing applicationsis herein incorporated by reference in its entirety for all purposes.

TECHNICAL FIELD

The present invention relates to the field of display technology, moreparticularly, to a touch control structure and a display apparatus.

BACKGROUND

Various types of touch panels have been developed. Examples of touchpanels include one-glass-solution (OGS) touch panels, on-cell touchpanels, and in-cell touch panels. The on-cell touch panels provide hightouch control accuracy. The on-cell touch panels can be classified intosingle-layer-on-cell (SLOC) touch panels and multi-layer-on-cell (MLOC)touch panels. In particular, multiple point touch control can beachieved in the MLOC touch panels with superior touch control accuracyand blanking effects.

SUMMARY

In one aspect, the present disclosure provides a touch controlstructure, comprising a plurality of touch electrodes in a touch controlarea and a plurality of touch signal lines in a peripheral area; whereina respective one of the plurality of touch signal lines comprises adouble-layer structure in a double-layer region and a single-layerstructure in a single-layer region; the peripheral area comprises afirst sub-area on a first side of the touch control area, a secondsub-area on a second side of the touch control area, a third sub-area ona third side of the touch control area, a fourth sub-area on a fourthside of the touch control area; the first sub-area comprises a sideregion, and one or more corner regions respectively at one or morecorners of the touch control structure; wherein the double-layer regionand the single-layer region are in the first sub-area, the firstsub-area has a first shortest width along a direction from the touchcontrol area to the first sub-area, the first shortest width is greaterthan a shortest width of at least one of sub-areas of the peripheralarea other than the first sub-area; a plurality of adjacent double-layerstructures in the double-layer region are respectively connected to aplurality of adjacent single-layer structures in the single-layerregion; at least two of the plurality of adjacent single-layerstructures are respectively in a first layer and a second layer; and thetouch control structure further comprises a touch insulating layerbetween the first layer and the second layer.

Optionally, a region where the double-layer structure transitions to thesingle-layer structure is at least partially in the one or more cornerregions.

Optionally, the double-layer region is at least partially in at leastone of the second sub-area, the third sub-area, or the fourth sub-area.

Optionally, the single-layer region is in the side region.

Optionally, the double-layer region is at least partially in the one ormore corner regions, and/or the single-layer region is at leastpartially in the one or more corner regions.

In another aspect, the present disclosure provides a touch controlstructure, comprising a plurality of touch electrodes in a touch controlarea and a plurality of touch signal lines in a peripheral area; whereina respective one of the plurality of touch signal lines comprises adouble-layer structure in a double-layer region and a single-layerstructure in a single-layer region, wherein the double-layer region andthe single-layer region are in a first sub-area of the peripheral areawhere the plurality of touch signal lines connect to an integratedcircuit, the first sub-area has a first shortest width along a directionfrom the touch control area to the first sub-area, the first shortestwidth is greater than a shortest width of at least one of sub-areas ofthe peripheral area other than the first sub-area; a plurality ofadjacent double-layer structures in the double-layer region arerespectively connected to a plurality of adjacent single-layerstructures in the single-layer region; at least two of the plurality ofadjacent single-layer structures are respectively in a first layer and asecond layer; and the touch control structure further comprises a touchinsulating layer between the first layer and the second layer.

Optionally, the first shortest width is greater than a shortest width ofany one of sub-areas of the peripheral area other than the firstsub-area.

Optionally, a respective double-layer structure comprises a firstportion in the first layer and a second portion in the second layer; afirst adjacent respective single-layer structure in the first layer isconnected to a respective first portion of a first adjacent double-layerstructure; and a second adjacent respective single-layer structure inthe second layer is connected to a respective second portion of a secondadjacent double-layer structure.

Optionally, the first portion and the second portion are connectedthrough a connecting via extending through the touch insulating layer.

Optionally, multiple first double-layer structures respectively ofmultiple touch signal lines of the plurality of touch signal lines areclustered in a first region; multiple first single-layer structuresrespectively of the multiple touch signal lines of the plurality oftouch signal lines are clustered in a second region; the multiple firstdouble-layer structures are substantially parallel to each other, andrespectively extend along a first direction; the multiple firstsingle-layer structures are substantially parallel to each other, andrespectively extend along a second direction; at least two of themultiple first single-layer structures are respectively in the firstlayer and the second layer; and the first direction and the seconddirection are different from each other, and intersecting each other atan angle greater than zero.

Optionally, multiple connecting points respectively connecting themultiple first double-layer structures and the multiple firstsingle-layer structures are arranged along a seventh direction; and thesecond direction and the seventh direction intersect each other at anangle in a range of 6 degrees to 15 degrees.

Optionally, multiple first single-layer structures respectively ofmultiple touch signal lines of the plurality of touch signal lines areclustered in a second region; multiple second single-layer structuresrespectively of the multiple touch signal lines of the plurality oftouch signal lines are clustered in a third region; the multiple secondsingle-layer structures are respectively connected to the multiple firstsingle-layer structures; the multiple first single-layer structures aresubstantially parallel to each other, and respectively extend along asecond direction; the multiple second single-layer structures aresubstantially parallel to each other, and respectively extend along athird direction; at least two of the multiple second single-layerstructures are respectively in the first layer and the second layer; andthe second direction and the third direction are different from eachother, and intersecting each other at an angle greater than zero.

Optionally, the second direction and the third direction intersect eachother at an angle in a range of 15 degrees to 25 degrees.

Optionally, multiple connecting points respectively connecting themultiple first single-layer structures and the multiple secondsingle-layer structures are arranged along a fourth direction; and thesecond direction and the fourth direction intersect each other at anangle in a range of 20 degrees to 40 degrees.

Optionally, multiple second single-layer structures respectively ofmultiple touch signal lines of the plurality of touch signal lines areclustered in a third region; multiple second double-layer structuresrespectively of the multiple touch signal lines of the plurality oftouch signal lines are clustered in a fourth region; the multiple secondsingle-layer structures are substantially parallel to each other, andrespectively extend along a third direction; the multiple seconddouble-layer structures are substantially parallel to each other, andrespectively extend along a fifth direction; at least two of themultiple second single-layer structures are respectively in the firstlayer and the second layer; the multiple second single-layer structuresare respectively connected to the multiple second double-layerstructures; and multiple second connecting points respectivelyconnecting the multiple second single-layer structures and the multiplesecond double-layer structures are arranged along a sixth direction.

Optionally, the sixth direction is substantially parallel to the seconddirection.

Optionally, the touch control structure comprises a via extendingthrough the touch insulating layer at a respective second connectingpoint, a material in the second layer connected to a material in thefirst layer through the via.

Optionally, multiple third double-layer structures respectively ofmultiple touch signal lines of the plurality of touch signal lines areclustered in a fifth region; multiple fourth double-layer structuresrespectively of the multiple touch signal lines of the plurality oftouch signal lines are clustered in a sixth region; multiple thirdsingle-layer structures respectively of the multiple touch signal linesof the plurality of touch signal lines are clustered in a seventhregion; a respective one of the multiple third single-layer structuresis a half loop structure connecting a respective one of the multiplethird double-layer structures and a respective one of the multiplefourth double-layer structures; the half loop structure comprises twoparallel portions respectively extending along a second direction and aconnecting portion connecting the two parallel portions together; atleast two of the multiple third single-layer structures are respectivelyin the first layer and the second layer; the multiple third double-layerstructures are substantially parallel to each other, and respectivelyextend along a first direction; the multiple fourth double-layerstructures are substantially parallel to each other, and respectivelyextend along the first direction; and the first direction and the seconddirection are different from each other, and intersecting each other atan angle greater than zero.

Optionally, multiple fourth single-layer structures respectively of themultiple touch signal lines of the plurality of touch signal lines areclustered in an eighth region; the multiple fourth single-layerstructures are respectively connected to the multiple third double-layerstructures; the multiple fourth single-layer structures aresubstantially parallel to each other, and respectively extend along thesecond direction; and the multiple fourth single-layer structures are atleast a sub-set of multiple first single-layer structures.

Optionally, the plurality of touch electrodes comprise a plurality offirst mesh electrodes arranged in a plurality of rows and a plurality ofsecond mesh electrodes arranged in a plurality of columns; and theplurality of first mesh electrodes and the plurality of second meshelectrodes are in the second layer.

Optionally, the touch control structure further comprises a plurality oftouch electrode bridges in the first layer; and vias extending throughthe touch insulating layer; wherein the plurality of touch electrodebridges respectively extend through the vias to respectively connectadjacent second mesh blocks in a respective column of a plurality ofcolumn of the plurality of second mesh electrodes.

Optionally, the plurality of touch signal lines comprise a plurality offirst touch signal lines respectively connected to the plurality offirst mesh electrodes; a plurality of second touch signal linesrespectively connected to first terminals of the plurality of secondmesh electrodes; and a plurality of third touch signal linesrespectively connected to second terminals of the plurality of secondmesh electrodes.

Optionally, the touch control structure is limited in a touch controlregion and absent in a window region at least partially surrounded bythe touch control region; wherein a window-crossing row of the pluralityof first mesh electrodes comprises a first mesh block and a second meshblock respectively on a first side and a second side of the windowregion; a first conductive plate directly connected to multiple meshlines of the first mesh block; a second conductive plate directlyconnected to multiple mesh lines of the second mesh block; and a firstconductive bridge connecting the first conductive plate and the secondconductive plate; wherein the first conductive plate, the secondconductive plate, and the first conductive bridge are respectivelyaround a first portion, a second portion, and a third portion of aperiphery of the window region; the first conductive plate and thesecond conductive plate are in the second layer; and the firstconductive bridge is in the first layer.

Optionally, the respective one of the plurality of touch signal lineshas a line width in a range of 2.5 μm to 4.5 μm; orthographicprojections of adjacent single-layer structures on a base substrate arespaced apart by a shortest distance in a range of 1.1 μm to 3.1 μm;orthographic projections of adjacent single-layer structures in thefirst layer on the base substrate are spaced apart by a shortestdistance in a range of 4.7 μm to 10.7 μm; and orthographic projectionsof adjacent single-layer structures in the second layer on the basesubstrate are spaced apart by a shortest distance in a range of 4.7 μmto 10.7 μm.

Optionally, at least two adjacent single-layer structures respectivelyin the first layer and the second layer are electrically connected toadjacent rows of touch electrodes.

Optionally, the first shortest width is smaller than a reference firstshortest width in a corresponding first sub-area in a reference touchcontrol structure in which touch signal lines have a double-layerstructure throughout the peripheral area.

In another aspect, the present disclosure provides a display apparatus,comprising a display panel; the touch control structure described hereinor fabricated by a method described herein; and an integrated circuit.

Optionally, the display panel comprises a plurality of light emittingelements; an encapsulating layer on the plurality of light emittingelements, wherein the encapsulating layer comprising a first inorganicencapsulating layer, an organic encapsulating layer on a side of thefirst inorganic encapsulating layer away from the plurality of lightemitting elements, a second inorganic encapsulating layer on a side ofthe organic encapsulating layer away from the first inorganicencapsulating layer; and a buffer layer on a side of the secondinorganic encapsulating layer away from the organic encapsulating layer;wherein the touch insulating layer is on a side of the buffer layer awayfrom the second inorganic encapsulating layer.

BRIEF DESCRIPTION OF THE FIGURES

The following drawings are merely examples for illustrative purposesaccording to various disclosed embodiments and are not intended to limitthe scope of the present invention.

FIG. 1A is a schematic diagram illustrating the structure of a touchcontrol structure in some embodiments according to the presentdisclosure.

FIG. 1B is a schematic diagram illustrating a touch control area and aperipheral area in a touch control structure in some embodimentsaccording to the present disclosure.

FIG. 2 is a partial zoom-in view of a touch control structure in aregion transition from a touch control area to a peripheral area in someembodiments according to the present disclosure.

FIG. 3A is a further zoom-in view of a zoom-in region in FIG. 2 .

FIG. 3B is a cross-sectional view along an A-A′ line in FIG. 3A.

FIG. 3C is a cross-sectional view along a B-B′ line in FIG. 3A.

FIG. 3D is a cross-sectional view along a C-C′ line in FIG. 3A.

FIG. 3E is a cross-sectional view of a plurality of adjacentsingle-layer structures ASLS in the single-layer region in someembodiments according to the present disclosure.

FIG. 3F is a cross-sectional view of a plurality of adjacentsingle-layer structures ASLS in the single-layer region in someembodiments according to the present disclosure.

FIG. 4 is a partial zoom-in view of a touch control structure in aregion transition from a touch control area to a peripheral area in someembodiments according to the present disclosure.

FIG. 5 is a further zoom-in view of a first zoom-in region in FIG. 4 .

FIG. 6 is a cross-sectional view along a D-D′ line in FIG. 5 .

FIG. 7 is a further zoom-in view of a second zoom-in region in FIG. 4 .

FIG. 8 is a further zoom-in view of a third zoom-in region in FIG. 7 .

FIG. 9 is a cross-sectional view along an E-E′ line in FIG. 8 .

FIG. 10 is a cross-sectional view along an F-F′ line in FIG. 8 .

FIG. 11 is a partial zoom-in view of a touch control structure in aregion transition from a touch control area to a peripheral area in someembodiments according to the present disclosure.

FIG. 12 is a further zoom-in view of FIG. 11 .

FIG. 13 illustrates a respective one of multiple third single-layerstructures connecting a respective one of multiple third double-layerstructures and a respective one of multiple fourth double-layerstructures.

FIG. 14 is a cross-sectional view along a G-G′ line in FIG. 12 .

FIG. 15 is a cross-sectional view along an H-H′ line in FIG. 1A.

FIG. 16 is a cross-sectional view along an I-I′ line in FIG. 1A.

FIG. 17 is a schematic diagram illustrating a touch control structure insome embodiments according to the present disclosure.

FIG. 18A is a schematic diagram illustrating a window region in someembodiments according to the present disclosure.

FIG. 18B is a zoom-in view of a touch control structure surrounding awindow region in some embodiments according to the present disclosure.

FIG. 18C is a further zoom-in view of a touch control structuresurrounding a window region in some embodiments according to the presentdisclosure.

FIG. 19 is a cross sectional view of a display panel in some embodimentsaccording to the present disclosure.

FIG. 20 is a schematic diagram illustrating a display area and aperipheral area in a display apparatus in some embodiments according tothe present disclosure.

DETAILED DESCRIPTION

The disclosure will now be described more specifically with reference tothe following embodiments. It is to be noted that the followingdescriptions of some embodiments are presented herein for purpose ofillustration and description only. It is not intended to be exhaustiveor to be limited to the precise form disclosed.

The present disclosure provides, inter alia, a touch control structureand a display apparatus that substantially obviate one or more of theproblems due to limitations and disadvantages of the related art. In oneaspect, the present disclosure provides a touch control structure. Insome embodiments, the touch control structure includes a plurality oftouch electrodes in a touch control area and a plurality of touch signallines in a peripheral area. A respective one of the plurality of touchsignal lines includes a double-layer structure in a double-layer regionand a single-layer structure in a single-layer region. Optionally, thedouble-layer region and the single-layer region are in a first sub-areaof the peripheral area where the plurality of touch signal lines connectto an integrated circuit, the first sub-area has a first shortest widthalong a direction from the touch control area to the first sub-area, thefirst shortest width is greater than a shortest width of at least one ofsub-areas of the peripheral area other than the first sub-area.Optionally, a plurality of adjacent double-layer structures in thedouble-layer region are respectively connected to a plurality ofadjacent single-layer structures in the single-layer region. Optionally,at least two of the plurality of adjacent single-layer structures arerespectively in a first layer and a second layer. Optionally, the touchcontrol structure further includes a touch insulating layer between thefirst layer and the second layer.

FIG. 1A is a schematic diagram illustrating the structure of a touchcontrol structure in some embodiments according to the presentdisclosure. Referring to FIG. 1A, the touch control structure in someembodiments includes a plurality of first mesh electrodes TE1 arrangedin a plurality of rows and a plurality of second mesh electrodes TE2arranged in a plurality of columns. Adjacent rows of the plurality ofrows are isolated from each other. Adjacent columns of the plurality ofcolumns are isolated from each other. Optionally, the touch controlstructure is a mutual capacitance type touch control structure.Optionally, the plurality of first mesh electrodes TE1 are a pluralityof touch sensing electrodes, and the plurality of second mesh electrodesTE2 are a plurality of touch scanning electrodes. Optionally, theplurality of first mesh electrodes TE1 are a plurality of touch scanningelectrodes, and the plurality of second mesh electrodes TE2 are aplurality of touch sensing electrodes.

In some embodiments, the plurality of touch signal lines include aplurality of first touch signal lines SGL1 respectively connected to theplurality of first mesh electrodes TE1; a plurality of second touchsignal lines SGL2 respectively connected to first terminals T1 of theplurality of second mesh electrodes TE2; and a plurality of third touchsignal lines SGL3 respectively connected to second terminals T2 of theplurality of second mesh electrodes TE2. Optionally, a respective one ofthe plurality of first mesh electrodes TE1 to a respective one of theplurality of first touch signal lines SGL1. Optionally, a respective oneof the plurality of second mesh electrodes TE2 is connected to arespective one of the plurality of second touch signal lines SGL2, andconnected to a respective one of the plurality of third touch signallines SGL3.

In some embodiments, the respective one of the plurality of first meshelectrodes TE1 extends along a second direction DR2; and the respectiveone of the plurality of second mesh electrodes TE2 extends along a firstdirection DR1. Optionally, the first direction DR1 and the seconddirection DR2 are two non-parallel directions, for example, the firstdirection DR1 and the second direction DR2 cross over each other.Optionally, the first direction DR1 and the second direction DR2 areperpendicular to each other. Optionally, the first direction DR1 and thesecond direction DR2 cross over each other at an inclined angle that isnot 90 degrees.

In some embodiments, the plurality of touch electrodes (e.g., theplurality of first mesh electrodes TE1 and the plurality of second meshelectrodes TE2) are in a touch control area TCA, and the plurality oftouch signal lines (e.g., the plurality of first touch signal linesSGL1, the plurality of second touch signal lines SGL2, and the pluralityof third touch signal lines SGL3) are in a peripheral area PA outside ofthe touch control area TCA.

FIG. 1B is a schematic diagram illustrating a touch control area and aperipheral area in a touch control structure in some embodimentsaccording to the present disclosure. Referring to FIG. 1B, in someembodiments, the peripheral area PA includes a first sub-area PA1 on afirst side S1 of the touch control area TCA, a second sub-area PA2 on asecond side S2 of the touch control area TCA, a third sub-area PA3 on athird side S3 of the touch control area TCA, a fourth sub-area PA4 on afourth side S4 of the touch control area TCA. Optionally, the first sideS1 and the fourth side S4 are opposite to each other. Optionally, thesecond side S2 and the third side S3 are opposite to each other.Optionally, the first sub-area PA1 is a sub-area where the plurality offirst touch signal lines SGL1, the plurality of second touch signallines SGL2, and the plurality of third touch signal lines SGL3 areconnected to an integrated circuit (e.g., an integrated touch controlcircuit).

In some embodiments, the first sub-area PA1 includes a side region SRand one or more corner regions (e.g., a first corner region CR1 and asecond corner region CR2). The one or more corner regions arerespectively at a corner of the touch control structure. The one or morecorner regions respectively connect the side region SR to one or moreadjacent sub-areas of the peripheral area PA. For example, the firstcorner region CR1 connects the side region SR to the second sub-areaPA2, and the second corner region CR2 connects the side region SR to thethird sub-area PA3.

In some embodiments, the first sub-area PA1 has a first shortest widthw1 along a direction from the touch control area TCA to the firstsub-area PAL. Optionally, the second sub-area PA2 has a second shortestwidth w2 along a direction from the touch control area TCA to the secondsub-area PA2. Optionally, the third sub-area PA3 has a third shortestwidth w3 along a direction from the touch control area TCA to the thirdsub-area PA3. Optionally, the fourth sub-area PA4 has a fourth shortestwidth w4 along a direction from the touch control area TCA to the fourthsub-area PA4. In some embodiments, the first shortest width w1 isgreater than at least one of the other shortest widths, e.g., greaterthan at least one of the second shortest width w2, the third shortestwidth w3, or the fourth shortest width w4. Optionally, the firstshortest width w1 is greater than any one of the other shortest widths,e.g., greater than the second shortest width w2, greater than the thirdshortest width w3, and greater than the fourth shortest width w4.

FIG. 2 is a partial zoom-in view of a touch control structure in aregion transition from a touch control area to a peripheral area in someembodiments according to the present disclosure. Referring to FIG. 2 ,the touch control structure in some embodiments includes a plurality oftouch signal lines. A respective one of the plurality of touch signallines in some embodiments includes a double-layer structure DLS in adouble-layer region DLR and a single-layer structure SLS in asingle-layer region SLR. The double-layer region DLR and thesingle-layer region SLR are in the peripheral area of the touch controlstructure. In some embodiments, the double-layer region DLR and thesingle-layer region SLR are in the first sub-area PAL.

In some embodiments, the touch control structure includes a plurality ofadjacent double-layer structures and a plurality of adjacentsingle-layer structures. In some embodiments, at least two of theplurality of adjacent single-layer structures are respectively in afirst layer and a second layer. FIG. 3A is a further zoom-in view of azoom-in region in FIG. 2 . FIG. 3B is a cross-sectional view along anA-A′ line in FIG. 3A. FIG. 3C is a cross-sectional view along a B-B′line in FIG. 3A. FIG. 3D is a cross-sectional view along a C-C′ line inFIG. 3A. Referring to FIG. 2 , FIG. 3A to FIG. 3D, a plurality ofadjacent double-layer structures ADLS in the double-layer region DLR arerespectively connected to a plurality of adjacent single-layerstructures ASLS in the single-layer region SLR. Referring to FIG. 3A toFIG. 3D, in some embodiments, at least two of the plurality of adjacentsingle-layer structures are respectively in a first layer SL1 and asecond layer SL2. In one example depicted in FIG. 3A to FIG. 3D, theplurality of adjacent single-layer structures ASLS are alternately in afirst layer SL1 and a second layer SL2. In the context of the presentdisclosure, the plurality of adjacent single-layer structures ASLS areportions of touch signal lines. For example, referring to FIG. 1A, FIG.2 , FIG. 3A to FIG. 3D, at least two adjacent single-layer structuresrespectively in the first layer SL1 and the second layer SL2 areelectrically connected to adjacent rows of touch electrodes.

In one example as shown in FIG. 3A to FIG. 3C, the touch controlstructure includes a buffer layer BUF on a second inorganicencapsulating sub-layer CVD2, the second inorganic encapsulatingsub-layer CVD2 being a sub-layer of an encapsulating layer forencapsulating light emitting elements in a display apparatus having thetouch control structure. In some embodiments, the touch controlstructure further includes a first layer SL1 on a side of the bufferlayer BUF away from the second inorganic encapsulating sub-layer CVD2, atouch insulating layer TI on a side of the first layer SL1 away from thebuffer layer BUF, a second layer SL2 on a side of the touch insulatinglayer TI away from the first layer SL1, and an overcoat layer OC on aside of the second layer SL2 away from the touch insulating layer TI.

In some embodiments, a respective double-layer structure includes afirst portion P1 in the first layer SL1 and a second portion P2 in thesecond layer SL2, as depicted in FIG. 3A to FIG. 3C. As shown in FIG.3B, a first adjacent respective single-layer structure ASLS1 in thesecond layer SL2 is connected to a respective second portion P2 of afirst adjacent double-layer structure ADLS1. A second adjacentrespective single-layer structure ASLS2 in the first layer SL1 isconnected to a respective first portion P1 of a second adjacentdouble-layer structure ADLS2. Optionally, the first adjacent respectivesingle-layer structure ASLS1 in the second layer SL2 is continuouslyconnected to the respective second portion P2 of a first adjacentdouble-layer structure ADLS1, forming a unitary structure. Optionally,the second adjacent respective single-layer structure ASLS2 in the firstlayer SL1 is continuously connected to the respective first portion P1of a second adjacent double-layer structure ADLS2, forming a unitarystructure.

Referring to FIG. 2 and FIG. 3D, in some embodiments, at least two ofthe plurality of adjacent single-layer structures ASLS are respectivelyin a first layer SL1 and a second layer SL2. In one example depicted inFIG. 2 and FIG. 3D, the plurality of adjacent single-layer structuresASLS are alternately in a first layer SL1 and a second layer SL2. Theinventors of the present disclosure discover that by having thisstructure, a pitch of the plurality of touch signal lines can besignificantly decreased, a display apparatus having the present touchstructure can be made to have a much narrower peripheral area. In oneexample, a width of a peripheral area from a display area to an edge ofthe display panel can be reduced from 1.36 mm to 1.076 mm. In anotherexample, a distance between the display area and a signal line moredistant to the display area can be reduced from 0.435 mm to 0.331 mm.Moreover, the signal lines in a same layer, for example, single-layerstructures in the first layer SL1 can be further spaced apart from eachother, avoiding short. By having the single-layer structures in a samelayer spaced apart further, it also reduces the complication involved inmaking a mask plate for patterning of the plurality of signal lines, andmakes the etching process less prone to defects.

For example, the first sub-area of the peripheral area having thedouble-layer region and the single-layer region discussed above has afirst shortest width along a direction from the touch control area tothe first sub-area. The first shortest width can be reduced from 1.36 mmto 1.076 mm. The reference value 1.36 mm may be a reference firstshortest width of a corresponding first sub-area of the peripheral areain a reference touch control structure that does not have thedouble-layer region and the single-layer region of the presentdisclosure. In one example, touch signal lines of the reference touchcontrol structure adopt a double-layer structure throughout theperipheral area. By forming the touch signal lines to have an intricatestructure as discussed in the present disclosure, the first shortestwidth in the first sub-area can be reduced as compared to that in thereference touch control structure.

For example, normally a minimum pitch of 7.5 μm is required to avoiddefects such as short and etching defects. By having the plurality ofadjacent single-layer structures ASLS alternately disposed in the firstlayer SL1 and the second layer SL2, a minimum pitch can be significantlyreduced to 5.6 μm or less. Further, signal lines in a same layer can bespaced apart, for example, from 7.5 μm to 11.2 μm or more.

In some embodiments, the respective one of the plurality of touch signallines has a line width in a range of 2.5 μm to 4.5 μm, e.g., 2.5 μm to3.0 μm, 3.0 μm to 3.5 μm, 3.5 μm to 4.0 μm, or 4.0 μm to 4.5 μm.Optionally, the respective one of the plurality of touch signal lineshas a line width of 3.5 μm. In some embodiments, the plurality ofadjacent single-layer structures ASLS has a line width (denoted as lw inFIG. 3D) in a range of 2.5 μm to 4.5 μm, e.g., 2.5 μm to 3.0 μm, 3.0 μmto 3.5 μm, 3.5 μm to 4.0 μm, or 4.0 μm to 4.5 μm. Optionally, theplurality of adjacent single-layer structures ASLS has a line width of3.5 μm. In some embodiments, the plurality of adjacent double-layerstructures ADLS has a line width in a range of 2.5 μm to 4.5 μm, e.g.,2.5 μm to 3.0 μm, 3.0 μm to 3.5 μm, 3.5 μm to 4.0 μm, or 4.0 μm to 4.5μm. Optionally, the plurality of adjacent double-layer structures ADLShas a line width of 3.5 μm.

Referring to FIG. 3D, in some embodiments, orthographic projections ofadjacent single-layer structures on a base substrate are spaced apart bya shortest distance d in a range of 1.1 μm to 3.1 μm, e.g., 1.1 μm to1.6 μm, 1.6 μm to 2.1 μm, or 2.6 μm to 3.1 μm. Optionally, theorthographic projections of adjacent single-layer structures on a basesubstrate are spaced apart by a shortest distance of 2.1 μm. In someembodiments, orthographic projections of adjacent single-layerstructures in the first layer SL1 on the base substrate are spaced apartby a shortest distance d1 in a range of 4.7 μm to 10.7 μm, e.g., 4.7 μmto 5.7 μm, 5.7 μm to 6.7 μm, 6.7 μm to 7.7 μm, 7.7 μm to 8.7 μm, 8.7 μmto 9.7 μm, or 9.7 μm to 10.7 μm. Optionally, the orthographicprojections of adjacent single-layer structures in the first layer SL1on the base substrate are spaced apart by a shortest distance of 7.7 μm.In some embodiments, orthographic projections of adjacent single-layerstructures in the second layer SL2 on the base substrate are spacedapart by a shortest distance d2 in a range of 4.7 μm to 10.7 μm, e.g.,4.7 μm to 5.7 μm, 5.7 μm to 6.7 μm, 6.7 μm to 7.7 μm, 7.7 μm to 8.7 μm,8.7 μm to 9.7 μm, or 9.7 μm to 10.7 μm. Optionally, the orthographicprojections of adjacent single-layer structures in the second layer SL2on the base substrate are spaced apart by a shortest distance of 7.7 μm.

Referring to FIG. 3D, Optionally, orthographic projections of adjacentsingle-layer structures in the first layer SL1 and the second layer SL2are non-overlapping with each other.

FIG. 3E is a cross-sectional view of a plurality of adjacentsingle-layer structures ASLS in the single-layer region in someembodiments according to the present disclosure. Referring to FIG. 3E,in some embodiments, orthographic projections of adjacent single-layerstructures of the plurality of adjacent single-layer structures ASLS ona base substrate directly abutting each other.

FIG. 3F is a cross-sectional view of a plurality of adjacentsingle-layer structures ASLS in the single-layer region in someembodiments according to the present disclosure. Referring to FIG. 3F,in some embodiments, orthographic projections of adjacent single-layerstructures of the plurality of adjacent single-layer structures ASLS ona base substrate at least partially overlapping with each other.

Referring to FIG. 3A to FIG. 3C, in some embodiments, the first portionP1 and the second portion P2 of a respective double-layer structure areconnected through a connecting via cv extending through the touchinsulating layer TI.

In some embodiments, orthographic projections of adjacent double-layerstructures on a base substrate are spaced apart by a shortest distance din a range of 3.0 μm to 5.0 μm, e.g., 3.0 μm to 3.5 μm, 3.5 μm to 4.0μm, 4.0 μm to 4.5 μm, or 4.5 μm to 5.0 μm. Optionally, the orthographicprojections of adjacent double-layer structures on a base substrate arespaced apart by a shortest distance of 4.0 μm.

FIG. 4 is a partial zoom-in view of a touch control structure in aregion transition from a touch control area to a peripheral area in someembodiments according to the present disclosure. FIG. 5 is a furtherzoom-in view of a first zoom-in region in FIG. 4 . Referring to FIG. 4and FIG. 5 , in some embodiments, multiple first double-layer structuresMDLS1 respectively of multiple touch signal lines of the plurality oftouch signal lines are clustered in a first region R1; and multiplefirst single-layer structures MSLS1 respectively of the multiple touchsignal lines of the plurality of touch signal lines are clustered in asecond region R2. The multiple first double-layer structures MDLS1 arerespectively connected to the multiple first single-layer structuresMSLS1 (as similarly discussed in connection with FIG. 2 , FIG. 3A toFIG. 3B). The first region R1 and the second region R2 are directlyadjacent to each other.

In some embodiments, the multiple first double-layer structures MDLS1and the multiple first single-layer structures MSLS1 are portions oftouch signal lines of a same type. In one example, the multiple firstdouble-layer structures MDLS1 and the multiple first single-layerstructures MSLS1 are portions of touch scanning signal lines connectedto touch scanning electrodes. In another example, the multiple firstdouble-layer structures MDLS1 and the multiple first single-layerstructures MSLS1 are portions of touch sensing signal lines connected totouch sensing electrodes. In one example, the multiple firstdouble-layer structures MDLS1 and the multiple first single-layerstructures MSLS1 are portions of the plurality of first touch signallines SGL1. The regions corresponding to the first region R1 and thesecond region R2 are denoted as R1′ and R2′ in FIG. 1A.

In some embodiments, multiple connecting points CP3 respectivelyconnecting the multiple first double-layer structures MDLS1 and themultiple first single-layer structures MSLS1 are arranged along aseventh direction DR7. Optionally, the second direction DR2 and theseventh direction DR7 are two non-parallel directions, for example, thesecond direction DR2 and the seventh direction DR7 cross over eachother. Optionally, the second direction DR2 and the seventh directionDR7 cross over each other at an inclined angle that is not 90 degrees.In some embodiments, the second direction DR2 and the seventh directionDR7 intersect each other at an angle in a range of 6 degrees to 15degrees, e.g., 6 degrees to 7 degrees, 7 degrees to 8 degrees, 8 degreesto 9 degrees, 9 degrees to 10 degrees, 10 degrees to 11 degrees, 11degrees to 12 degrees, 12 degrees to 13 degrees, 13 degrees to 14degrees, or 14 degrees to 15 degrees. Optionally, the second directionDR2 and the seventh direction DR7 intersect each other at an angle of10.5 degrees.

FIG. 6 is a cross-sectional view along a D-D′ line in FIG. 5 . Referringto FIG. 6 , and as similarly discussed above in connection with FIG. 3Ato FIG. 3D, in some embodiments, in the second region R2, at least twoof the multiple first single-layer structures MSLS1 are respectively inthe first layer SL1 and the second layer SL2. In one example as depictedin FIG. 6 , FIG. 3A to FIG. 3D, in the second region R2, the multiplefirst single-layer structures MSLS1 are alternately in the first layerSL1 and the second layer SL2.

In some embodiments, the multiple first double-layer structures MDLS1are substantially parallel to each other, and respectively extend alonga first direction DR1; and the multiple first single-layer structuresMSLS1 are substantially parallel to each other, and respectively extendalong a second direction DR2. The first direction DR1 and the seconddirection DR2 are different from each other, and intersecting each otherat an angle greater than zero. Optionally, the first direction DR1 andthe second direction DR2 are two non-parallel directions, for example,the first direction DR1 and the second direction DR2 cross over eachother. Optionally, the first direction DR1 and the second direction DR2are perpendicular to each other. Optionally, the first direction DR1 andthe second direction DR2 cross over each other at an inclined angle thatis not 90 degrees.

FIG. 8 is a further zoom-in view of a second zoom-in region in FIG. 4 .Referring to FIG. 4 and FIG. 8 , in some embodiments, multiple firstsingle-layer structures MSLS1 respectively of the multiple touch signallines of the plurality of touch signal lines are clustered in a secondregion R2; and multiple second single-layer structures MSLS2respectively of the multiple touch signal lines of the plurality oftouch signal lines are clustered in a third region R3. The multiplefirst single-layer structures MSLS1 are respectively connected to themultiple second single-layer structures MSLS2. The second region R2 andthe third region R3 are directly adjacent to each other.

In some embodiments, the multiple first single-layer structures MSLS1and the multiple second single-layer structures MSLS2 are portions oftouch signal lines of a same type. In one example, the multiple firstsingle-layer structures MSLS1 and the multiple second single-layerstructures MSLS2 are portions of touch scanning signal lines connectedto touch scanning electrodes. In another example, the multiple firstsingle-layer structures MSLS1 and the multiple second single-layerstructures MSLS2 are portions of touch sensing signal lines connected totouch sensing electrodes. In one example, the multiple firstsingle-layer structures MSLS1 and the multiple second single-layerstructures MSLS2 are portions of the plurality of first touch signallines SGL1. In one example, the multiple first single-layer structuresMSLS1 and the multiple second single-layer structures MSLS2 are portionsof the plurality of second touch signal lines SGL2. In one example, themultiple first single-layer structures MSLS1 and the multiple secondsingle-layer structures MSLS2 are portions of the plurality of thirdtouch signal lines SGL3.

In some embodiments, the multiple first single-layer structures MSLS1are substantially parallel to each other, and respectively extend alonga second direction DR2; and the multiple second single-layer structuresMSLS2 are substantially parallel to each other, and respectively extendalong a third direction DR3. Optionally, the second direction DR2 andthe third direction DR3 are two non-parallel directions, for example,the second direction DR2 and the third direction DR3 cross over eachother. Optionally, the second direction DR2 and the third direction DR3cross over each other at an inclined angle that is not 90 degrees. Insome embodiments, the second direction DR2 and the third direction DR3intersect each other at an angle in a range of 15 degrees to 25 degrees,e.g., 15 degrees to 17 degrees, 17 degrees to 19 degrees, 19 degrees to21 degrees, 21 degrees to 23 degrees, or 23 degrees to 25 degrees.Optionally, the second direction DR2 and the third direction DR3intersect each other at an angle of 20.03 degrees.

FIG. 9 is a cross-sectional view along an E-E′ line in FIG. 8 .Referring to FIG. 9 , in some embodiments, in the second region R2, atleast two of the multiple first single-layer structures MSLS1 arerespectively in the first layer SL1 and the second layer SL2. In oneexample as depicted in FIG. 9 and FIG. 8 , in the second region R2, themultiple first single-layer structures MSLS1 are alternately in thefirst layer SL1 and the second layer SL2. In some embodiments, in thethird region R3, at least two of the multiple second single-layerstructures MSLS2 are respectively in the first layer SL1 and the secondlayer SL2. In one example as depicted in FIG. 9 and FIG. 8 , in thethird region R3, the multiple second single-layer structures MSLS2 arealternately in the first layer SL1 and the second layer SL2.

In some embodiments, multiple connecting points CP1 respectivelyconnecting the multiple first single-layer structures MSLS1 and themultiple second single-layer structures MSLS2 are arranged along afourth direction DR4. Optionally, the second direction DR2 and thefourth direction DR4 are two non-parallel directions, for example, thesecond direction DR2 and the fourth direction DR4 cross over each other.Optionally, the second direction DR2 and the fourth direction DR4 crossover each other at an inclined angle that is not 90 degrees. In someembodiments, the second direction DR2 and the fourth direction DR4intersect each other at an angle in a range of 20 degrees to 40 degrees,e.g., 20 degrees to 25 degrees, 25 degrees to 30 degrees, 30 degrees to35 degrees, or 35 degrees to 40 degrees. Optionally, the seconddirection DR2 and the fourth direction DR4 intersect each other at anangle of 30.848 degrees.

In some embodiments, referring to FIG. 4 , FIG. 7 , and FIG. 8 ,multiple second single-layer structures MSLS2 respectively of themultiple touch signal lines of the plurality of touch signal lines areclustered in a third region R3; and multiple second double-layerstructures MDLS2 respectively of the multiple touch signal lines of theplurality of touch signal lines are clustered in a fourth region R4. Themultiple second single-layer structures MSLS2 are respectively connectedto the multiple second double-layer structures MDLS2. The third regionR3 and the fourth region R4 are directly adjacent to each other.Optionally, the third region R3 and the fourth region R4 are in a cornerregion of the touch control structure. For example, the regionscorresponding to the third region R3 and the fourth region R4 aredenoted as R3′ and R4′ in FIG. 1A.

In some embodiments, the multiple second single-layer structures MSLS2and the multiple second double-layer structures MDLS2 are portions oftouch signal lines of a same type. In one example, the multiple secondsingle-layer structures MSLS2 and the multiple second double-layerstructures MDLS2 are portions of touch scanning signal lines connectedto touch scanning electrodes. In another example, the multiple secondsingle-layer structures MSLS2 and the multiple second double-layerstructures MDLS2 are portions of touch sensing signal lines connected totouch sensing electrodes. In one example, the multiple secondsingle-layer structures MSLS2 and the multiple second double-layerstructures MDLS2 are portions of the plurality of first touch signallines SGL1. In one example, the multiple second single-layer structuresMSLS2 and the multiple second double-layer structures MDLS2 are portionsof the plurality of second touch signal lines SGL2. In one example, themultiple second single-layer structures MSLS2 and the multiple seconddouble-layer structures MDLS2 are portions of the plurality of thirdtouch signal lines SGL3.

In some embodiments, the multiple second single-layer structures MSLS2are substantially parallel to each other, and respectively extend alonga third direction DR3; and the multiple second double-layer structuresMDLS2 are substantially parallel to each other, and respectively extendalong a fifth direction DR5.

In some embodiments, the third direction DR3 and the fifth direction DR5are substantially parallel to each other, e.g., within an error of lessthan 5 degrees, or perfectly parallel to each other.

In some embodiments, the third direction DR3 and the fifth direction DR5are two non-parallel directions, for example, the third direction DR3and the fifth direction DR5 cross over each other. Optionally, the thirddirection DR3 and the fifth direction DR5 cross over each other at aninclined angle that is not 90 degrees. In some embodiments, the thirddirection DR3 and the fifth direction DR5 intersect each other at anangle less than 10 degrees.

Referring to FIG. 9 , in some embodiments, in the third region R3, themultiple second single-layer structures MSLS2 are alternately in thefirst layer SL1 and the second layer SL2.

In some embodiments, multiple second connecting points CP2 respectivelyconnecting the multiple second single-layer structures MSLS2 and themultiple second double-layer structures MDLS2 are arranged along a sixthdirection DR6.

In some embodiments, the second direction DR2 and the sixth directionDR6 are substantially parallel to each other, e.g., within an error ofless than 5 degrees, or perfectly parallel to each other.

In some embodiments, the second direction DR2 and the sixth directionDR6 are two non-parallel directions, for example, the second directionDR2 and the sixth direction DR6 cross over each other. Optionally, thesecond direction DR2 and the sixth direction DR6 cross over each otherat an inclined angle that is not 90 degrees. In some embodiments, thesecond direction DR2 and the sixth direction DR6 intersect each other atan angle less than 10 degrees.

FIG. 10 is a cross-sectional view along an F-F′ line in FIG. 8 .Referring to FIG. 8 and FIG. 10 , the touch control structure in someembodiments includes a via v extending through the touch insulatinglayer TI at a respective second connecting point CP2, a material in thesecond layer SL2 connected to a material in the first layer SL1 throughthe via v.

FIG. 11 is a partial zoom-in view of a touch control structure in aregion transition from a touch control area to a peripheral area in someembodiments according to the present disclosure. FIG. 12 is a furtherzoom-in view of FIG. 11 . Referring to FIG. 11 and FIG. 12 , multiplethird double-layer structures MDLS3 respectively of multiple touchsignal lines of the plurality of touch signal lines are clustered in afifth region R5; multiple fourth double-layer structures MDLS4respectively of the multiple touch signal lines of the plurality oftouch signal lines are clustered in a sixth region R6; multiple thirdsingle-layer structures MSLS3 respectively of the multiple touch signallines of the plurality of touch signal lines are clustered in a seventhregion R7. The multiple fourth double-layer structures MDLS4 in thesixth regions R6 are respectively connected to the multiple thirdsingle-layer structures MSLS3 in the seventh region R7. The multiplethird single-layer structures MSLS3 in the seventh region R7 arerespectively connected to the multiple third double-layer structuresMDLS3 in the fifth region R5. The sixth regions R6 is directly adjacentto the seventh region R7. The seventh region R7 is directly adjacent tothe fifth region R5.

In some embodiments, the multiple third double-layer structures MDLS3,the multiple fourth double-layer structures MDLS4, and the multiplethird single-layer structures MSLS3 are portions of touch signal linesof a same type. In one example, the multiple third double-layerstructures MDLS3, the multiple fourth double-layer structures MDLS4, andthe multiple third single-layer structures MSLS3 are portions of touchscanning signal lines connected to touch scanning electrodes. In anotherexample, the multiple third double-layer structures MDLS3, the multiplefourth double-layer structures MDLS4, and the multiple thirdsingle-layer structures MSLS3 are portions of touch sensing signal linesconnected to touch sensing electrodes. In one example, the multiplethird double-layer structures MDLS3, the multiple fourth double-layerstructures MDLS4, and the multiple third single-layer structures MSLS3are portions of the plurality of first touch signal lines SGL1. In oneexample, the multiple third double-layer structures MDLS3, the multiplefourth double-layer structures MDLS4, and the multiple thirdsingle-layer structures MSLS3 are portions of the plurality of secondtouch signal lines SGL2. In one example, the multiple third double-layerstructures MDLS3, the multiple fourth double-layer structures MDLS4, andthe multiple third single-layer structures MSLS3 are portions of theplurality of third touch signal lines SGL3.

FIG. 13 illustrates a respective one of multiple third single-layerstructures connecting a respective one of multiple third double-layerstructures and a respective one of multiple fourth double-layerstructures. Referring to FIG. 13 , a respective one of the multiplethird single-layer structures MSLS3 is a half loop structure connectinga respective one of the multiple third double-layer structures MDLS3 anda respective one of the multiple fourth double-layer structures MDLS4.The half loop structure includes two parallel portions PP1 and PP2respectively extending along a second direction DR2 and a connectingportion CPP connecting the two parallel portions PP1 and PP2 together.

In some embodiments, the multiple third double-layer structures MDLS3are substantially parallel to each other, and respectively extend alonga first direction DR1; and the multiple fourth double-layer structuresMDLS4 are substantially parallel to each other, and respectively extendalong the first direction DR1. The first direction DR1 and the seconddirection DR2 are different from each other, and intersecting each otherat an angle greater than zero. Optionally, the first direction DR1 andthe second direction DR2 are two non-parallel directions, for example,the first direction DR1 and the second direction DR2 cross over eachother. Optionally, the first direction DR1 and the second direction DR2are perpendicular to each other. Optionally, the first direction DR1 andthe second direction DR2 cross over each other at an inclined angle thatis not 90 degrees.

FIG. 14 is a cross-sectional view along a G-G′ line in FIG. 12 .Referring to FIG. 12 and FIG. 14 , in some embodiments, in the seventhregion R7, at least two of the multiple third single-layer structuresMSLS3 are respectively in the first layer SL1 and the second layer SL2.In one example as depicted in FIG. 14 and FIG. 12 , in the seventhregion R7, the multiple third single-layer structures MSLS3 arealternately in the first layer SL1 and the second layer SL2.

Referring to FIG. 11 and FIG. 12 , in some embodiments, multiple fourthsingle-layer structures MSLS4 respectively of the multiple touch signallines of the plurality of touch signal lines are clustered in an eighthregion R8. The multiple fourth single-layer structures MSLS4 aresubstantially parallel to each other, and respectively extend along thesecond direction DR2. The multiple fourth single-layer structures MSLS4are respectively connected to the multiple third double-layer structuresMDLS3. As shown in FIG. 4 , FIG. 5 , FIG. 11 , and FIG. 12 , themultiple fourth single-layer structures MSLS4 are at least a sub-set ofmultiple first single-layer structures MSLS1.

FIG. 15 is a cross-sectional view along an H-H′ line in FIG. 1A. FIG. 16is a cross-sectional view along an I-I′ line in FIG. 1A. As shown inFIG. 1A, FIG. 15 , and FIG. 16 , in some embodiments, the touch controlstructure includes a plurality of first mesh electrodes TE1 arranged ina plurality of rows and a plurality of second mesh electrodes TE2arranged in a plurality of columns. The plurality of first meshelectrodes TE1 and the plurality of second mesh electrodes TE2 are inthe second layer SL2. The touch control structure further includes aplurality of touch electrode bridges EB in the first layer SL1; and viasVb extending through the touch insulating layer TI. Optionally, theplurality of touch electrode bridges EB respectively extend through thevias Vb to respectively connect adjacent second mesh blocks in arespective column of the plurality of column of the plurality of secondmesh electrodes TE2.

FIG. 17 is a schematic diagram illustrating a touch control structure insome embodiments according to the present disclosure. Referring to FIG.17 , the touch control structure in some embodiments includes aplurality of first mesh electrodes TE1 and a plurality of second meshelectrodes TE2. Optionally, the touch control structure is a mutualcapacitance type touch control structure. Optionally, the plurality offirst mesh electrodes TE1 are a plurality of touch scanning electrodes,and the plurality of second mesh electrodes TE2 are a plurality of touchsensing electrodes. Optionally, the plurality of mesh touch electrodesTE1 are a plurality of touch sensing electrodes, and the plurality ofsecond mesh electrodes TE2 are a plurality of touch scanning electrodes.The touch control structure is limited in a touch control region TCR andabsent in a window region WR surrounded by the touch control region TCR.For example, the touch control structure may be a touch controlstructure in a display panel, where the touch control region TCRsubstantially overlaps with a display region of the display panel, andthe window region WR is a region in the display panel having a holeconfigured for installing an accessory such as a camera lens or afingerprint sensor. The display panel is configured to display an imagein at least a portion of the touch control region TCR. In one example,in the window region WR, display elements of the display panel and thetouch control structure are absent; in the display region or at least aportion of the touch control region TCR, both display elements of thedisplay panel and the touch control structure are present.

Referring to FIG. 17 , in some embodiments, the plurality of mesh touchelectrodes TE1 are arranged in a plurality of rows, each of which is arespective one of the plurality of mesh touch electrodes TE1; theplurality of mesh scanning electrodes TE2 are arranged in a plurality ofcolumns, each of which is a respective one of the plurality of secondmesh electrodes TE2. In some embodiments, at least one row of theplurality of rows of first mesh electrodes TE1 crosses over the windowregion WR. For example, as shown in FIG. 17 , a window-crossing row Rwcof the plurality of first mesh electrodes TE1 crosses over the windowregion WR. The touch electrode in the window-crossing row Rwc is spacedapart by the window region WR into two portions (a portion on left sideof the window region WR and a portion on right side of the window regionWR). In some embodiments, at least one column of the plurality ofcolumns of second mesh electrodes TE2 crosses over the window region WR.For example, as shown in FIG. 17 , a window-crossing column Cwc of theplurality of second mesh electrodes TE2 crosses over the window regionWR. The touch electrode in the window-crossing column Cwc is spacedapart by the window region WR into two portions (a portion on upper sideof the window region WR and a portion on lower side of the window regionWR).

FIG. 18A is a schematic diagram illustrating a window region in someembodiments according to the present disclosure. FIG. 18B is a zoom-inview of a touch control structure surrounding a window region in someembodiments according to the present disclosure. FIG. 18C is a furtherzoom-in view of a touch control structure surrounding a window region insome embodiments according to the present disclosure. Referring to FIG.18A, in some embodiments, the window region WR has at least four sides,including a first side S1, a second side S2, a third side S3, and afourth side S4. Referring to FIG. 18A to FIG. 18C, in some embodiments,the window-crossing row Rwc of the plurality of first mesh electrodesTE1 includes a first mesh block MB1 and a second mesh block MB2respectively on a first side S1 and a second side S2 of the windowregion WR; a first conductive plate CP1 directly connected to multiplemesh lines of the first mesh block MB1; a second conductive plate CP2directly connected to multiple mesh lines of the second mesh block MB2;and a first conductive bridge CB1 connecting the first conductive plateCP1 and the second conductive plate CP2.

In the present touch control structure, the adjacent mesh blocks (e.g.,the first mesh block MB1 and the second mesh block MB2) separated by thewindow region WR are connected by a conductive connecting bridge (e.g.,the first conductive bridge CB1) through the aid of conductive plates(e.g., the first conductive plate CP1 and the second conductive plateCP2). Because forming the connecting bridge typically involves formingvias to connect corresponding mesh electrodes, it is extremely difficultto precisely connect mesh electrode lines with the connecting bridgewithout a conductive plate as an intermediate. The novel and uniquestructure of the present touch control structure ensures the adjacentmesh blocks separated by the window region WR are connected to transmittouch signals.

Referring to FIG. 18A and FIG. 18C, the first conductive plate CP1, thesecond conductive plate CP2, and the first conductive bridge CB1 arerespectively around a first portion P1, a second portion P2, and a thirdportion P3 of a periphery of the window region WR. Optionally, the thirdportion P3 is partially overlapping with the first portion P1, andpartially overlapping with the second portion P2. Optionally, the firstportion P1 is on the first side S1 of the window region WR; the secondportion P2 is on the second side S2 of the window region WR; and thethird portion P3 is on the fourth side S4 of the window region WR.

Referring to FIG. 18A to FIG. 18C, in some embodiments, thewindow-crossing column Cwc of the plurality of second mesh electrodesTE2 includes a third mesh block MB3 and a fourth mesh block MB4respectively on a third side S3 and a fourth side S4 of the windowregion WR; a third conductive plate CP3 directly connected to multiplemesh lines of the third mesh block MB3; a fourth conductive plate CP4directly connected to multiple mesh lines of the fourth mesh block MB4;and a second conductive bridge CB2 connecting the third conductive plateCP3 and the fourth conductive plate CP4.

Referring to FIG. 18A and FIG. 18C, the third conductive plate CP3, thefourth conductive plate CP4, and the second conductive bridge CB2 arerespectively around a fourth portion P4, a fifth portion P5, and a sixthportion P6 of the periphery of the window region WR. In one example, thethird conductive plate CP3, the fourth conductive plate CP4, and thesecond conductive bridge CB2 are parts of a unitary structure; the thirdconductive plate CP3 include a plate of a first arch shape, the fourthconductive plate CP4 include a plate of a second arch shape, and thesecond conductive bridge CB2 include a bridge of a third arch shape. Inanother example, the third arch shape is non-concentric with respect tothe first arch shape, and is non-concentric with respect to the secondarch shape, thus the boundary between the third conductive plate CP3 andthe second conductive bridge CB2 and boundary between the fourthconductive plate CP4 and the second conductive bridge CB2 can bediscerned. In another example, the third arch shape has a radiusdifferent from that of the first arch shape, and different from that ofthe second arch shape, thus the boundary between the third conductiveplate CP3 and the second conductive bridge CB2 and boundary between thefourth conductive plate CP4 and the second conductive bridge CB2 can bediscerned. Optionally, the sixth portion P6 is partially overlappingwith the fourth portion P4, and partially overlapping with the fifthportion P5. Optionally, the fourth portion P4 is on the third side S3 ofthe window region WR; the fifth portion P5 is on the fourth side S4 ofthe window region WR; and the sixth portion P6 is on the second side S2of the window region WR.

Referring to FIG. 18A to FIG. 18C, in some embodiments, thewindow-crossing row Rwc of the plurality of first mesh electrodes TE1further includes a third conductive bridge CB3 connecting the firstconductive plate CP1 and the second conductive plate CP2. Referring toFIG. 18A and FIG. 18C, the first conductive plate CP1, the secondconductive plate CP2, and the third conductive bridge CB3 arerespectively around a first portion P1, a second portion P2, and aseventh portion P7 of a periphery of the window region WR. Optionally,the seventh portion P7 is partially overlapping with the first portionP1, and partially overlapping with the second portion P2. Optionally,the first portion P1 is on the first side S1 of the window region WR;the second portion P2 is on the second side S2 of the window region WR;and the seventh portion P7 is on the third side S3 of the window regionWR.

Referring to FIG. 18A to FIG. 18C, in some embodiments, thewindow-crossing column Cwc of the plurality of second mesh electrodesTE2 further includes a fourth conductive bridge CB4 connecting the thirdconductive plate CP3 and the fourth conductive plate CP4. Referring toFIG. 18A and FIG. 18C, the third conductive plate CP3, the fourthconductive plate CP4, and the fourth conductive bridge CB4 arerespectively around a fourth portion P4, a fifth portion P5, and aneighth portion P8 of the periphery of the window region WR. Optionally,the eighth portion P8 is partially overlapping with the fourth portionP4, and partially overlapping with the fifth portion P5. Optionally, thefourth portion P4 is on the third side S3 of the window region WR; thefifth portion P5 is on the fourth side S4 of the window region WR; andthe eighth portion P8 is on the first side S1 of the window region WR.

Referring to FIG. 17 , in some embodiments, the window-crossing row Rwcfurther includes a plurality of first non-window mesh blocks NWB1, andthe window-crossing column Cwc further includes a plurality of secondnon-window mesh blocks NWB2. Optionally, at least the first mesh blockMB1 has an area smaller than (by 5%, by 10%, by 20%, by 30%, by 40%, by50%, by 60%, by 70%, by 80%, by 90%, or by 95% or more) each of theplurality of first non-window mesh blocks NWB1 due to presence of thewindow region WR. Optionally, the first mesh block MB1 has an areasmaller than each of the plurality of first non-window mesh blocks NWB1,and the second mesh block MB2 also has an area smaller than each of theplurality of first non-window mesh blocks NWB1. Optionally, at least thethird mesh block MB3 has an area smaller than each of the plurality ofsecond non-window mesh blocks NWB2 due to presence of the window regionWR. Optionally, the third mesh block MB3 has an area smaller than eachof the plurality of second non-window mesh blocks NWB2, and the fourthmesh block MB4 also has an area smaller than each of the plurality ofsecond non-window mesh blocks NWB2.

In another aspect, the present disclosure provides a display apparatus.In some embodiments, the display apparatus includes a display panel; atouch control structure described herein or fabricated by a methoddescribed herein; and an integrated circuit. Examples of appropriatedisplay apparatuses include, but are not limited to, an electronicpaper, a mobile phone, a tablet computer, a television, a monitor, anotebook computer, a digital album, a GPS, etc. Optionally, the displayapparatus is an organic light emitting diode display apparatus.Optionally, the display apparatus is a liquid crystal display apparatus.

FIG. 19 is a cross sectional view of a display panel in some embodimentsaccording to the present disclosure. Referring to FIG. 19 , in thedisplay region, the display panel includes a base substrate BS, aplurality of thin film transistors TFT on the base substrate BS, apassivation layer PVX on a side of the plurality of thin filmtransistors TFT away from the base substrate BS, a first planarizationlayer PLN1 on side of the passivation layer PVX away from the basesubstrate BS, a relay electrode RE on side of the first planarizationlayer PLN1 away from the passivation layer PVX, a second planarizationlayer PLN2 on a side of the relay electrode RE away from the firstplanarization layer PLN1, a pixel definition layer PDL on a side of thesecond planarization layer PLN2 away from the first planarization layerPLN1 and defining subpixel apertures, an anode AD on a side of thesecond planarization layer PLN2 away from the first planarization layerPLN1, a light emitting layer EL on a side of the anode AD away from thesecond planarization layer PLN2, a cathode CD on a side of the lightemitting layer EL away from the anode AD, a first inorganicencapsulating layer CVD1 on a side of the cathode CD away from lightemitting layer EL, an organic encapsulating layer IJP on a side of thefirst inorganic encapsulating layer CVD1 away from the cathode CD, asecond inorganic encapsulating layer CVD2 on a side of the organicencapsulating layer IJP away from the first inorganic encapsulatinglayer CVD1, a buffer layer BUF on a side of the second inorganicencapsulating layer CVD2 away from the organic encapsulating layer IJP,a touch insulating layer TI on a side of the buffer layer BUF away fromthe second inorganic encapsulating layer CVD2, touch electrodes (e.g.,the plurality of first touch electrodes TE1 and the plurality of secondtouch electrodes TE2 as shown in FIG. 19 ) on a side of the touchinsulating layer TI away from the buffer layer BUF, and an overcoatlayer OC on a side of the touch electrodes away from the touchinsulating layer TI.

FIG. 20 is a schematic diagram illustrating a display area and aperipheral area in a display apparatus in some embodiments according tothe present disclosure. Referring to FIG. 20 , in some embodiments, thedisplay apparatus includes a display area DA and a peripheral area PA.Optionally, the display area DA is substantially the same as the touchcontrol area TCA in FIG. 1B, and the peripheral area PA is substantiallythe same as the peripheral area PA in FIG. 1B. In some embodiments, theperipheral area PA includes a first sub-area PA1 on a first side S1 ofthe display area DA, a second sub-area PA2 on a second side S2 of thedisplay area DA, a third sub-area PA3 on a third side S3 of the displayarea DA, a fourth sub-area PA4 on a fourth side S4 of the display areaDA. Optionally, the first side S1 and the fourth side S4 are opposite toeach other. Optionally, the second side S2 and the third side S3 areopposite to each other. Optionally, the first sub-area PA1 is a sub-areawhere the plurality of first touch signal lines SGL1, the plurality ofsecond touch signal lines SGL2, and the plurality of third touch signallines SGL3 are connected to an integrated circuit (e.g., an integratedtouch control circuit).

In some embodiments, the first sub-area PA1 includes a side region SRand one or more corner regions (e.g., a first corner region CR1 and asecond corner region CR2). The one or more corner regions arerespectively at a corner of the touch control structure. The one or morecorner regions respectively connect the side region SR to one or moreadjacent sub-areas of the peripheral area PA. For example, the firstcorner region CR1 connects the side region SR to the second sub-areaPA2, and the second corner region CR2 connects the side region SR to thethird sub-area PA3.

In some embodiments, the first sub-area PA1 has a first shortest widthw1 along a direction from the display area DA to the first sub-area PA1.Optionally, the second sub-area PA2 has a second shortest width w2 alonga direction from the display area DA to the second sub-area PA2.Optionally, the third sub-area PA3 has a third shortest width w3 along adirection from the display area DA to the third sub-area PA3.Optionally, the fourth sub-area PA4 has a fourth shortest width w4 alonga direction from the display area DA to the fourth sub-area PA4. In someembodiments, the first shortest width w1 is greater than at least one ofthe other shortest widths, e.g., greater than at least one of the secondshortest width w2, the third shortest width w3, or the fourth shortestwidth w4. Optionally, the first shortest width w1 is greater than anyone of the other shortest widths, e.g., greater than the second shortestwidth w2, greater than the third shortest width w3, and greater than thefourth shortest width w4.

For example, the first sub-area PA1 of the peripheral area having thedouble-layer region and the single-layer region discussed above has afirst shortest width w1 along a direction from the touch control area tothe first sub-area PAL. The first shortest width w1 can be reduced from1.36 mm to 1.076 mm. The reference value 1.36 mm may be a referencefirst shortest width of a corresponding first sub-area of the peripheralarea in a reference display apparatus that does not have thedouble-layer region and the single-layer region of the presentdisclosure. In one example, touch signal lines of the reference displayapparatus adopt a double-layer structure throughout the peripheral area.By forming the touch signal lines to have an intricate structure asdiscussed in the present disclosure, the first shortest width in thefirst sub-area can be significantly reduced as compared to that in thereference display apparatus.

As used herein, the term “display area” refers to an area of a displaysubstrate (e.g., an opposing substrate or an array substrate) in adisplay panel where image is actually displayed. Optionally, the displayarea may include both a subpixel region and an inter-subpixel region. Asubpixel region refers to a light emission region of a subpixel, such asa region corresponding to a pixel electrode in a liquid crystal displayor a region corresponding to a light emissive layer in an organic lightemitting diode display panel. An inter-subpixel region refers to aregion between adjacent subpixel regions, such as a region correspondingto a black matrix in a liquid crystal display or a region correspondinga pixel definition layer in an organic light emitting diode displaypanel. Optionally, the inter-subpixel region is a region betweenadjacent subpixel regions in a same pixel. Optionally, theinter-subpixel region is a region between two adjacent subpixel regionsfrom two adjacent pixels.

In another aspect, the present disclosure provides a method offabricating a touch control structure. In some embodiments, the methodincludes forming a plurality of touch electrodes in a touch control areaand forming a plurality of touch signal lines in a peripheral area.Optionally, forming a respective one of the plurality of touch signallines includes forming a double-layer structure in a double-layer regionand forming a single-layer structure in a single-layer region.Optionally, the double-layer region and the single-layer region are in afirst sub-area of the peripheral area where the plurality of touchsignal lines connect to an integrated circuit, the first sub-area has afirst shortest width along a direction from the touch control area tothe first sub-area, the first shortest width is greater than a shortestwidth of at least one of sub-areas of the peripheral area other than thefirst sub-area. Optionally, a plurality of adjacent double-layerstructures in the double-layer region are formed to be respectivelyconnected to a plurality of adjacent single-layer structures in thesingle-layer region. Optionally, at least two of the plurality ofadjacent single-layer structures are formed to be respectively in afirst layer and a second layer. Optionally, the method further includesforming a touch insulating layer between the first layer and the secondlayer.

The foregoing description of the embodiments of the invention has beenpresented for purposes of illustration and description. It is notintended to be exhaustive or to limit the invention to the precise formor to exemplary embodiments disclosed. Accordingly, the foregoingdescription should be regarded as illustrative rather than restrictive.Obviously, many modifications and variations will be apparent topractitioners skilled in this art. The embodiments are chosen anddescribed in order to explain the principles of the invention and itsbest mode practical application, thereby to enable persons skilled inthe art to understand the invention for various embodiments and withvarious modifications as are suited to the particular use orimplementation contemplated. It is intended that the scope of theinvention be defined by the claims appended hereto and their equivalentsin which all terms are meant in their broadest reasonable sense unlessotherwise indicated. Therefore, the term “the invention”, “the presentinvention” or the like does not necessarily limit the claim scope to aspecific embodiment, and the reference to exemplary embodiments of theinvention does not imply a limitation on the invention, and no suchlimitation is to be inferred. The invention is limited only by thespirit and scope of the appended claims. Moreover, these claims mayrefer to use “first”, “second”, etc. following with noun or element.Such terms should be understood as a nomenclature and should not beconstrued as giving the limitation on the number of the elementsmodified by such nomenclature unless specific number has been given. Anyadvantages and benefits described may not apply to all embodiments ofthe invention. It should be appreciated that variations may be made inthe embodiments described by persons skilled in the art withoutdeparting from the scope of the present invention as defined by thefollowing claims. Moreover, no element and component in the presentdisclosure is intended to be dedicated to the public regardless ofwhether the element or component is explicitly recited in the followingclaims.

What is claimed is:
 1. A touch control structure, comprising a pluralityof touch electrodes in a touch control area and a plurality of touchsignal lines in a peripheral area; wherein a respective one of theplurality of touch signal lines comprises a double-layer structure in adouble-layer region and a single-layer structure in a single-layerregion; the peripheral area comprises a first sub-area on a first sideof the touch control area, a second sub-area on a second side of thetouch control area, a third sub-area on a third side of the touchcontrol area, a fourth sub-area on a fourth side of the touch controlarea; the first sub-area comprises a side region, and one or more cornerregions respectively at one or more corners of the touch controlstructure; wherein the double-layer region and the single-layer regionare in the first sub-area, the first sub-area has a first shortest widthalong a direction from the touch control area to the first sub-area, thefirst shortest width is greater than a shortest width of at least one ofsub-areas of the peripheral area other than the first sub-area; aplurality of adjacent double-layer structures in the double-layer regionare respectively connected to a plurality of adjacent single-layerstructures in the single-layer region; at least two of the plurality ofadjacent single-layer structures are respectively in a first layer and asecond layer; and the touch control structure further comprises a touchinsulating layer between the first layer and the second layer.
 2. Thetouch control structure of claim 1, wherein a region where thedouble-layer structure transitions to the single-layer structure is atleast partially in the one or more corner regions.
 3. The touch controlstructure of claim 1, wherein the double-layer region is at leastpartially in at least one of the second sub-area, the third sub-area, orthe fourth sub-area.
 4. The touch control structure of claim 1, whereinthe single-layer region is in the side region.
 5. The touch controlstructure of claim 1, wherein the double-layer region is at leastpartially in the one or more corner regions, and/or the single-layerregion is at least partially in the one or more corner regions.
 6. Thetouch control structure of claim 1, wherein a respective double-layerstructure comprises a first portion in the first layer and a secondportion in the second layer; a first adjacent respective single-layerstructure in the second layer is connected to a respective secondportion of a first adjacent double-layer structure; and a secondadjacent respective single-layer structure in the first layer isconnected to a respective first portion of a second adjacentdouble-layer structure.
 7. The touch control structure of claim 6,wherein the first portion and the second portion are connected through aconnecting via extending through the touch insulating layer.
 8. Thetouch control structure of claim 1, wherein multiple first double-layerstructures respectively of multiple touch signal lines of the pluralityof touch signal lines are clustered in a first region; multiple firstsingle-layer structures respectively of the multiple touch signal linesof the plurality of touch signal lines are clustered in a second region;the multiple first double-layer structures are substantially parallel toeach other, and respectively extend along a first direction; themultiple first single-layer structures are substantially parallel toeach other, and respectively extend along a second direction; at leasttwo of the multiple first single-layer structures are respectively inthe first layer and the second layer; and the first direction and thesecond direction are different from each other, and intersecting eachother at an angle greater than zero.
 9. The touch control structure ofclaim 8, wherein multiple connecting points respectively connecting themultiple first double-layer structures and the multiple firstsingle-layer structures are arranged along a seventh direction; and thesecond direction and the seventh direction intersect each other at anangle in a range of 6 degrees to 15 degrees.
 10. The touch controlstructure of claim 1, wherein the plurality of touch electrodes comprisea plurality of first mesh electrodes arranged in a plurality of rows anda plurality of second mesh electrodes arranged in a plurality ofcolumns; and the plurality of first mesh electrodes and the plurality ofsecond mesh electrodes are in the second layer.
 11. The touch controlstructure of claim 10, further comprising: a plurality of touchelectrode bridges in the first layer; and vias extending through thetouch insulating layer; wherein the plurality of touch electrode bridgesrespectively extend through the vias to respectively connect adjacentsecond mesh blocks in a respective column of a plurality of column ofthe plurality of second mesh electrodes.
 12. The touch control structureof claim 10, wherein the plurality of touch signal lines comprise: aplurality of first touch signal lines respectively connected to theplurality of first mesh electrodes; a plurality of second touch signallines respectively connected to first terminals of the plurality ofsecond mesh electrodes; and a plurality of third touch signal linesrespectively connected to second terminals of the plurality of secondmesh electrodes.
 13. The touch control structure of claim 1, wherein atleast two adjacent single-layer structures respectively in the firstlayer and the second layer are electrically connected to adjacent rowsof touch electrodes.
 14. The touch control structure of claim 1, whereinmultiple first single-layer structures respectively of multiple touchsignal lines of the plurality of touch signal lines are clustered in asecond region; multiple second single-layer structures respectively ofthe multiple touch signal lines of the plurality of touch signal linesare clustered in a third region; the multiple second single-layerstructures are respectively connected to the multiple first single-layerstructures; the multiple first single-layer structures are substantiallyparallel to each other, and respectively extend along a seconddirection; the multiple second single-layer structures are substantiallyparallel to each other, and respectively extend along a third direction;at least two of the multiple second single-layer structures arerespectively in the first layer and the second layer; and the seconddirection and the third direction are different from each other, andintersecting each other at an angle greater than zero.
 15. The touchcontrol structure of claim 1, wherein multiple second single-layerstructures respectively of multiple touch signal lines of the pluralityof touch signal lines are clustered in a third region; multiple seconddouble-layer structures respectively of the multiple touch signal linesof the plurality of touch signal lines are clustered in a fourth region;the multiple second single-layer structures are substantially parallelto each other, and respectively extend along a third direction; themultiple second double-layer structures are substantially parallel toeach other, and respectively extend along a fifth direction; at leasttwo of the multiple second single-layer structures are respectively inthe first layer and the second layer; the multiple second single-layerstructures are respectively connected to the multiple seconddouble-layer structures; and multiple second connecting pointsrespectively connecting the multiple second single-layer structures andthe multiple second double-layer structures are arranged along a sixthdirection.
 16. The touch control structure of claim 1, wherein multiplethird double-layer structures respectively of multiple touch signallines of the plurality of touch signal lines are clustered in a fifthregion; multiple fourth double-layer structures respectively of themultiple touch signal lines of the plurality of touch signal lines areclustered in a sixth region; multiple third single-layer structuresrespectively of the multiple touch signal lines of the plurality oftouch signal lines are clustered in a seventh region; a respective oneof the multiple third single-layer structures is a half loop structureconnecting a respective one of the multiple third double-layerstructures and a respective one of the multiple fourth double-layerstructures; the half loop structure comprises two parallel portionsrespectively extending along a second direction and a connecting portionconnecting the two parallel portions together; at least two of themultiple third single-layer structures are respectively in the firstlayer and the second layer; the multiple third double-layer structuresare substantially parallel to each other, and respectively extend alonga first direction; the multiple fourth double-layer structures aresubstantially parallel to each other, and respectively extend along thefirst direction; and the first direction and the second direction aredifferent from each other, and intersecting each other at an anglegreater than zero.
 17. The touch control structure of claim 16, whereinmultiple fourth single-layer structures respectively of the multipletouch signal lines of the plurality of touch signal lines are clusteredin an eighth region; the multiple fourth single-layer structures arerespectively connected to the multiple third double-layer structures;the multiple fourth single-layer structures are substantially parallelto each other, and respectively extend along the second direction; andthe multiple fourth single-layer structures are at least a sub-set ofmultiple first single-layer structures.
 18. The touch control structureof claim 1, wherein the respective one of the plurality of touch signallines has a line width in a range of 2.5 μm to 4.5 μm; orthographicprojections of adjacent single-layer structures on a base substrate arespaced apart by a shortest distance in a range of 1.1 μm to 3.1 μm;orthographic projections of adjacent single-layer structures in thefirst layer on the base substrate are spaced apart by a shortestdistance in a range of 4.7 μm to 10.7 μm; and orthographic projectionsof adjacent single-layer structures in the second layer on the basesubstrate are spaced apart by a shortest distance in a range of 4.7 μmto 10.7 μm.
 19. A display apparatus, comprising: a display panel; thetouch control structure of claim 1; and an integrated circuit.
 20. Thedisplay apparatus of claim 19, wherein the display panel comprises: aplurality of light emitting elements; an encapsulating layer on theplurality of light emitting elements, wherein the encapsulating layercomprising a first inorganic encapsulating layer, an organicencapsulating layer on a side of the first inorganic encapsulating layeraway from the plurality of light emitting elements, a second inorganicencapsulating layer on a side of the organic encapsulating layer awayfrom the first inorganic encapsulating layer; and a buffer layer on aside of the second inorganic encapsulating layer away from the organicencapsulating layer; wherein the touch insulating layer is on a side ofthe buffer layer away from the second inorganic encapsulating layer.